Burglar alarm for automobiles



Oct. 9, 1928.

E. (Fa-SCHULTZ,

BURGLAR ALARM FOR AUTOMOBILES Filed Marcli 28, 1927 gWOMM Patented Oct. 9, 1928.

UNITED T'ES. P T ENT ori= cs "EMIL G. soriULTz, or 'MILWAUKEE' wrsoons'm.

BURGLAR ALARM FORAUTOMOBIIJES. 7

Application filed 'March 28, 1927. SerialNo. 179-070.,

Further objects are to provide a burglar alarm for automobiles which is designed to blow a Whistle whenever the engine is started and which is so constructed that the whistle will continuously sound as long as the engine is running when the device is set ina certain position, and which is also so madev that the operator is merely required to step upon a button in order to set the device. 7

Further ob ects are to provide a device which when moved into operative position or alarm giving position will automatically lock itself and which may be released only by the insertion and'rotation of a key to withdraw the locking plunger. 7

Further objects are to provide a device which may be readily produced from simple castings, for instance, and which is of extremely simple and rugged construction.

An embodiment of the invention is shown in the accompanying drawings in which Figure 1 is a sectional view through the device and through a portion of the automobile floor board to which it is attached;

Figure 2 is a transverse sectional view on the line 2-2 of Figure 1.

Referring to the drawings, it will be seen that the device comprises a casing 1 which is preferably rectangular in contour, although obviously, it may take other shapes, and which is formed of two sections provided with projecting ears 2 which are riveted or bolted together, as indicated at 3 in Figure 2. Each half section is provided with a projecting pipe-like portion 4, as shown in Figure 1, and the extreme ends'of these pipe-like portions are preferably split, as indicated at 5. The pipe-like portions are adapted to receive the exhaust pipe 6 and the pipe 7 leading to the muffler.

Clamps 8 surround the pipe-like portions and are drawn together by suitable bolts 9. The upper part of the casing 1 is provided with an outwardly projecting apertured and internally threaded boss 10 within whicha whistle 11 screws. This whistle is preferably pinned in place, as indicated by the reference character 12, to prevent removal.

I of the valve" member.

operator desires to throw the device into The upper portion of the casing is closedand is provided with a pair of outwardly projecting cars 13 which are bolted through the floor bottom 1 1- to the ears 15 0f a small casing 16 a look 1! equipped with a key slot 18 and with a spring pressed plunger 19. The plunger 19," it will be noted is provided with a bevelled face '20 on itsupper side.

hin the casing 1, a slida-ble valve memis provided, and it will be noted from e 2, that this valve-like member cona rectangularbox-like portion open towards the whistle side of the casing 1 and open at its-top. It is provided with a closed bottom 22 which is normally positioned above the ipe-lilze portions 41 as may be seen from Figure 1. is provided with a transverse member to which is secured the plunger rodor operating rod 2%. This plunger rod is provided with The upper portion'of the valve secured to the upper side-of the re 1 I. noor bottom. This casing is provided with an upper notch it is also provided with I a head and is surrounded bya spring 2? which urges the rodupwardly.

In using the device, it will be; apparent that the exhaust gases pass directly through the lower portion of the casing to the/muffler and the whistle is cut off by the bottom 22 However, when the operation, as when lie-leaves the can, for example, he merely-steps upon the button 26 and depresses the plunger 24.. This moves the valve into its lower dotted line position, and it will be seen that the exhaust pipe is then thrown into communication with the whistle and is cut off from the pipe 7 leading to the mufiier. The spring pressed plunger 19 of the lock snaps into the notch 25 and locks the plunger 24 in depressed position. The flat face of the plunger 19 contacts with the Hat face of the notch 25 and obviously prevents upward withdrawal of the plunger. The apparatus, therefore, gives a very loud continuous signal, as long'as the engine.

is running.

When the operator returns to his car, all

to the notch 25, may be formed in the plunger rod 24, so as to provide a second notch into which the plunger 19 of the lock snaps. In view of the fact'thatthe plunger 19 has a bevelled upper face 20, it is apparent that this locking plunger will be cammed out of the lower notch when the operator steps upon the button 26. Such a construction may be resorted to merely for the purpose of frictionally holding the plunger rod 2% in elevated position, although usually the spring 27 will be found sufficient.

It is thus clear that a very simple and easily produced device has been provided which may be instantly thrown into operation without the use of the lock key, and which may be readily released by means of the lock key carried by the operator.

Further, it is apparent that the device may be very readily installed, as it is merely necessary to cut out a section of the exhaust pipe and slip the ends of the apparatus over the ends of the pipe, as shown in Figure 1 and to bolt the lock portion'through the floor of the automobile to the casing flanges.

Although the invention has been described in considerable detail, such description is intended as illustrative rather than limiting as the invention may be variously embodied and as the scope of such invention is to be determined as claimed.

I claim: I

1. In an automobile, the combination of an exhaust pipe, a two-part casing having its two parts riveted together and having an inlet portion connected to the exhaust plpe and having a pair of outlet openings, a mufiier pipe connected to said casing at one of the outlet portions and in line with the exhaust pipe, a sounding device connected to said casing at the other of said outlet openings, and a slide valve carried within said casing and slidable to either of two positions, said slide valve having a closed bottom positioned muffler pipe, said casing having a second outlet, a whistle secured to said casing and communicating with said second outlet, a slidable valve carried within said casing and having a valve rod projecting upwardly therefrom and through the floor board, 'a lock secured to the upper side ofthe floor board and having a spring pressed plunger, said valve rod having a notch therein for the reception of said plunger when said valve is moved to a position placing'the' whistle in communication with the exhaust pipe, a spring urging said valve rod upwardly to place the exhaust pipe and muffler pipe in communication, and a knob carried by the upper end of said valve rod, whereby said knob may be depressed by the operator and said valve rod will be latched by the'pl'unger I of said lock to hold said Valve in the position placing the whistle in communication with the exhaust pipe, said casing having a rectangular interior and said valve being rectangular and fitting the interior of said casing. I

In testimony that I claim the foregoing I have hereunto set my hand at lwilwaukee, in the county of Milwaukee and State of Wisconsin. t I

EMIL G. SCHULTZ. 

